Fluke 2680 User Manual
®
2680A/2686A
Data Acquisition System/Data Logging System
June 2002, Rev. 1, 4/04
© 2002, 2004 Fluke Corporation. All rights reserved.
All product names are trademarks of t heir resp ective co mpani es.
Users Manual
Limited Warranty and Limitation of Liability
Each Fluke product is warranted to be free from defects in material and workmanship under normal
use and service. The warranty period is one year and begins on the date of shipment. Parts, product
repairs and services are warranted for 90 days. This warranty extends only to the original buyer or
end-user customer of a Fluke authorized reseller, and doe s not appl y to fuses, di spo sab le batteries
or to any product which, in Fluke's opinion, has been misused, altered, neglected, contaminated, or
damaged by accident or abnormal condit ion s of operatio n or handling .
Fluke warrants that software will operate substantially in accordance with its functional specifications
for 90 days and that it has been properly recorded on non-defective media. Fluke does not warrant
that software will be error free or operate without interruption. The software is neither intended nor
warranted for use in medical or any other applications where human safety may be a concern.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user
customers only but have no authority to extend a greater or different warranty on behalf of Fluke.
Warranty support is available only if product is purchased through a Fluke authorized sales outlet or
Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for
importation costs of repair/replacement parts when product purchased in one country is submitted for
repair in another country.
Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge
repair, or replacement of a defective product which is returned to a Fluke authorized service center
within the warranty period.
To obtain warranty service, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that service center, with a description of the
difficulty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in
transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB
Destination). If Fluke determines that failure was caused by neglect, misuse, contamination,
alteration, accident or abnormal condition of operation or handling, including over vo ltage failures
caused by use outside the product’s specified rating, or normal wear and tear of mechanical
components, Fluke will provide an estimate of repair costs and obtain authorization before
commencing the work. Following repair, the product will be returned to the Buyer transportation
prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping
Point).
THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR LOSSES AND/OR PROFITS, INCLUDING LOSS OF DATA,
ARISING FROM ANY CAUSE OR THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion
or limitation of incidental or consequential damages, the limitations and exclusions of this warranty
may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a
court or other decision-maker of competent jurisdiction, such holding will not affect the validity or
enforceability of any other provision.
Fluke Corporation Fluke Europe B.V.
P.O. Box 9090 P.O. Box 1186
Everett, WA 98206-9090 5602 BD Eindhoven
U.S.A. The Netherlands
2/02
XWCaution
This is an IEC safety Class 1 product. Before using, the
ground wire in the line cord or rear panel binding post
must be connect to an earth ground for safety.
Interference Information
This equipment generates and uses radio frequency energy and if not installed and used in strict
accordance with the manufacturer’s instructions, may cause interference to radio and television
reception. It has been type tested and found to comply with the limits for a Class B computing device
in accordance with the specifications of Part 15 of FCC Rules, which are designed to provide
reasonable protection against such interference in a residential installation.
Operation is subject to the following two conditions:
• This device may not cause harmful interfere nce .
• This device must accept any interference received, including interference that may cause
undesired operation.
There is no guarantee that interference will not occur in a particular installation. If this equipment
does cause interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one of more of the
following measures:
• Reorient the receiving antenna
• Relocate the equipment with respect to the receiver
• Move the equipment away from the receiver
• Plug the equipment into a different outlet so that the computer and receiver are on different
branch circuits
If necessary, the user should consult the dealer or an experienced radio/television technician for
additional suggestions. The user may find the following booklet prepared by the Federal
Communications Commission helpful: How to Identify and Resolve Radio-TV Interference Problems.
This booklet is available from the U.S. Government Printing Office, Washington, D.C. 20402. Stock
No. 004-000-00345-4.
SAFETY TERMS IN THIS MANUAL
This device has been designed and tested to meet the requirements of EN61010-1
(Safety Requirements for Electrical Equipment for Measurement, Control and
Laboratory Use). It is an Installation Category II device intended for operation from
a normal single phase supply. The DIO relay controls are rated to 250 V ac CAT I
and should not be used in applications that exceed that rating.
contains information, warnings and cautions. Use of this equipment in a manner
not specified herein may impair the protection provided by the equipment.
Measurement category I is for measurements performed on circuits not directly
connected to MAINS. Examples are measurements on circuits not derived from
MAINS, and specially protected (internal) MAINS derived circuits.
Measurement category II is for measurements performed on circuits directly
connected to the low voltage installation. Examples are measurements on
household appliances, portable tools and similar equipment.
XWWARNING statements identify conditions or practices that could result in
personal injury or loss of life.
XWCAUTION statements identify conditions or practices that could result in
damage to equipment.
SYMBOLS MARKED ON EQUIPMENT:
This Users Manual
X WARNING Risk of electric shock.
J Ground (earth) terminal.
.
W
AC POWER SOURCE
The device is intended to operate from an ac power source that will not apply more
than 264 V ac rms between the supply conductors or between either supply
conductor and ground. A protective ground connection by way of the grounding
conductor in the power cord is required for safe operation.
Protective ground (earth) terminal. Must be connected to safety earth
ground when the power cord is used.
Attention. Refer to the manual. This symbol indicates that information
about usage of a feature is contained in the manual. This symbol
appears on the Universal Input Module and in the following two places
on the device rear panel:
1. Ground Binding Post (to the left of the line power connector).
2. Alarm/Trigger I/O and Digital I/O connectors.
XWWARNING
Use the proper fuse. To avoid fire hazard, for fuse
replacement use only a 1/2 ampere, 250 V time delay line
fuse.
DC POWER SOURCE
The device may also be operated from a 9 V to 45 V dc power source when either
the rear panel ground binding post or the power cord grounding conductor is
connected properly. The input is protected by a 4 ampere fuse internal to the
device. This fuse should only be replaced by a qualified Fluke technician.
GROUNDING THE DEVICE
The device utilizes controlled overvoltage techniques that require the device to be
grounded whenever normal mode or common mode ac voltages or transient
voltages may occur. The enclosure must be grounded through the grounding
conductor of the power cord, or if operated on battery with the power cord
unplugged, through the rear panel ground binding post.
USE THE PROPER POWER CORD
Use only the power cord and connector appropriate for the voltage and plug
configuration in your country.
Use only a power cord that is in good condition.
Refer power cord and connector changes to qualified service personnel.
XWWARNING
To avoid possible electric shock or damage to the device:
• Read manual before operating.
• Do not position device so that air flow through side
vents is restricted.
• Do not use in a manner not specified in this manual or
safety protection may be impaired.
• Disconnect power cord and ALL other inputs before
replacing a fuse.
• Position the device where power cord can be
disconnected.
• Do not exceed maximum voltages.
XWWARNING
• Do not operate in explosive atmospheres.
• To avoid personal injury or death, do not remove the
device cover without first removing the power source
connected to the rear panel. Do not operate the device
without the cover properly installed. There is no need
for the operator to remove the cover.
• Do not attempt to operate if protection may be
impaired.
• If the device appears damaged or operates abnormally,
protection may be impaired. Do not attempt to operate
the device under these conditions. Refer all question
of proper device operation to qualified service
personnel.
• Do not attempt to service unless you are a Fluke
qualified repair technician.
• To avoid personal injury or death, remove the AC
power cord and all analog and digital connector
modules before servicing the device.
Note
All signals must be removed from the analog and digital connector
wiring before opening the connector modules.
The following table provides additional safety information.
General Specifications
Specification Characteristic
Size 473 mm (18.6 in) x 432 mm (17 in) x 237 mm (9.3 in)
Weight 2680A/2686A (empty) 8.6 Kg (18.9 lb)
2680A – FAI 0.8 Kg (1.8 lb)
2680A – PAI 1.2 Kg (2.7 lb)
2680A – DIO 0.8 Kg (1.8 lb)
Power 100 – 240 V ac (no switching required), 50 to 60 Hz, 100 VA
maximum or optional 9 V d c to 45 V dc, 35 W maximum
EMC EN50082-2
EN55022-1
EN55011 class A
EN610000-4-2,3,4,6,8
EN61326
Safety EN61010-1, CAT II
CSA C22.2 No. 1010.1
Operating Temperature
-20 oC to 60 oC (-4 oF to +140 oF)
Range
Storage Temperature
-40 oC to 70 oC (-40 oF to +158 oF)
Range
Relative Humidity 90% maximum for -10 oC to 28 oC (14 oF to +82 oF)
75% maximum for 28
50% maximum for 35
o
C to 35 oC (82 oF to +95 oF)
o
C to 60 oC (95 oF to +140 oF)
(3 MΩ range, reduce humidity rating by 25% for 1 hour warm-up.
3 MΩ range meets full humidity ratings with 2 hour warm-up)
Altitude Operating: 2,000 m (6,562 ft) maximum
Non-operating: 12,200 m (40,000 ft) maximum
Table of Contents
Chapter Title Page
1 Overview........................................................................................... 1-1
Introduction...................................................................................................... 1-3
Contacting Fluke.............................................................................................. 1-3
Instrument Features and Capabilities............................................................... 1-5
Mainframe Features................................................................................... 1-8
Trigger Input......................................................................................... 1-8
Trigger Output ...................................................................................... 1-8
PC Card ATA Interface (2686A Only)................................................. 1-8
Master Alarm ........................................................................................ 1-9
Interval Trigger..................................................................................... 1-9
External Trigger.................................................................................... 1-9
Alarms................................................................................................... 1-9
Channel Monitoring.............................................................................. 1-10
Alarm Trigger ....................................................................................... 1-10
Channel Numbering .................................................................................. 1-10
Computed Channels .................................................................................. 1-11
Mx+B Scaling ........................................................................................... 1-11
Analog Channels ....................................................................................... 1-11
Digital I/O Module Option........................................................................ 1-12
Digital I/O............................................................................................. 1-12
Relay Output......................................................................................... 1-12
Totalizer................................................................................................ 1-12
User Interface................................................................................................... 1-13
Operating a 2680 Series Data Acquisition System.......................................... 1-14
Isolated Networks...................................................................................... 1-14
General Networks...................................................................................... 1-14
Ethernet Port.............................................................................................. 1-14
Group Operations...................................................................................... 1-15
Scanning and Logging............................................................................... 1-15
RS-232 Interface ....................................................................................... 1-17
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2680A/2686A
Users Manual
Host Computer Requirements......................................................................... 1-17
Options and Accessories ................................................................................. 1-18
2 Preparing for Operation................................................................... 2-1
Introduction..................................................................................................... 2-3
Instrument Preparation.................................................................................... 2-4
Unpacking and Inspecting the Instrument ................................................ 2-5
Positioning and Rack Mounting ............................................................... 2-5
Connecting to a Power Source and Grounding......................................... 2-5
Operating Using AC Power.................................................................. 2-6
Operating Using DC Power.................................................................. 2-7
Grounding and Common Mode Voltage.............................................. 2-7
Alarm/Trigger I/O Connection ................................................................. 2-7
Trigger Input......................................................................................... 2-8
Trigger Output...................................................................................... 2-9
Master Alarm........................................................................................ 2-10
External Trigger Wiring for a Group........................................................ 2-10
Universal Input Module Analog Connections (2620A-180)..................... 2-12
Shielded Wiring.................................................................................... 2-15
Crosstalk Considerations...................................................................... 2-15
Digital I/O Connector Module.................................................................. 2-15
Digital I/O............................................................................................. 2-16
Totalizer................................................................................................ 2-16
Totalizer Enable ................................................................................... 2-17
Relays ................................................................................................... 2-17
Controls and Indicators............................................................................. 2-17
Front Panel Controls............................................................................. 2-17
Front Panel Indicators .......................................................................... 2-19
Rear Panel Controls.............................................................................. 2-22
Rear Panel Indicators............................................................................ 2-23
Front Panel Operating Procedures ............................................................ 2-24
Power-On Options................................................................................ 2-24
Displaying a Monitor Channel ............................................................. 2-25
Displaying the Digital I/O Status ......................................................... 2-27
Displaying Relay Status ....................................................................... 2-28
Displaying the Totalizer Status ............................................................ 2-30
Reviewing and Setting the Base Channel Number............................... 2-31
Reviewing and Setting the Line Frequency.......................................... 2-33
Reviewing and Setting the Network Type............................................ 2-35
Reviewing and Setting the General Network Socket Port.................... 2-40
Reviewing and Setting the General Network IP Address..................... 2-41
Reviewing and Setting the Subnet Mask and Default Gateway........... 2-42
Viewing the Instrument Ethernet Address ........................................... 2-44
Reviewing and Setting PC Card Options ............................................. 2-46
ii
Contents
(continued)
Host Computer and Network Preparation........................................................ 2-47
Installing Host Computer Ethernet Adapter.............................................. 2-47
Instrument and Host Computer Interconnection ....................................... 2-49
Host Computer/Instrument Direct Connection ..................................... 2-49
Interconnection Using 10/100BaseT (Twisted Pair) Ethernet Wiring.. 2-50
Set Up Windows Networking ................................................................... 2-52
Setting Host Computer Networking Parameters ....................................... 2-53
Installing Fluke DAQ Software................................................................. 2-53
Testing and Troubleshooting ........................................................................... 2-54
Installing and Testing the Installation ....................................................... 2-54
Troubleshooting Network Problems ......................................................... 2-58
3 Using Fluke DAQ Software .............................................................. 3-1
Introduction...................................................................................................... 3-3
Installing Fluke DAQ Software ....................................................................... 3-4
Understanding the User Interface .................................................................... 3-5
Fluke DAQ Main Window........................................................................ 3-5
Using the Toolbar...................................................................................... 3-6
Understanding the Workspace Area.......................................................... 3-8
Configuration Dialogs............................................................................... 3-9
Main Configuration Dialog................................................................... 3-9
Instrument Configuration Dialog.......................................................... 3-9
Module Configuration Dialog............................................................... 3-10
Analog Channel Configuration Dialog ................................................. 3-10
DIO Configuration Dialog.................................................................... 3-10
Computed Channel Configuration Dialog ............................................ 3-10
Communication Dialogs............................................................................ 3-11
Main Communication Dialog ............................................................... 3-11
Instrument Communication and Status Dialog..................................... 3-11
Module Communication Dialog ........................................................... 3-11
Digital I/O Points Dialog...................................................................... 3-11
Computed Channels Dialog.................................................................. 3-11
Communications Icons.......................................................................... 3-12
Security Dialogs........................................................................................ 3-12
Trend Dialog ............................................................................................. 3-13
Alarm Dialog............................................................................................. 3-13
Mail and Web Settings Dialogs................................................................. 3-13
Managing Your Network Using Fluke DAQ................................................... 3-14
Inserting and Configuring an Instrument .................................................. 3-14
Inserting and Configuring a Module ......................................................... 3-19
Inserting and Configuring a Channel ........................................................ 3-23
Configuring a Computed Channel............................................................. 3-26
Configuring Multiple Channels................................................................. 3-29
Using Equations with Computed Channels............................................... 3-30
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2680A/2686A
Users Manual
Configuring Data Files.................................................................................... 3-46
Main Window Advanced Settings................................................................... 3-55
Using Fluke DAQ System Security Features.................................................. 3-56
Configuring Web and Alarm Mail Settings .................................................... 3-58
Starting a Scan .......................................................................................... 3-32
Starting a Configuration Scan .............................................................. 3-32
Starting an Instrument Scan.................................................................. 3-33
Getting Scan Data................................................................................. 3-33
Viewing and Resetting the Totalizer .................................................... 3-34
PC Card Functions.................................................................................... 3-34
Getting PC Card Information ............................................................... 3-34
Formatting the PC Card........................................................................ 3-34
Getting PC Card Scan Data.................................................................. 3-35
Starting Spy .............................................................................................. 3-36
Viewing Module Measurement Data........................................................ 3-38
Using the Digital I/O Points Communication Dialog............................... 3-39
Using Trend to View Collected Data........................................................ 3-40
Changing the Trend Chart Display....................................................... 3-43
Viewing Alarms........................................................................................ 3-44
Selecting a Master for a Data Group......................................................... 3-47
Advanced Data File Configuration........................................................... 3-47
Real-time Data File Creation .................................................................... 3-53
4 Maintenance ..................................................................................... 4-1
Introduction..................................................................................................... 4-3
Self-Test Diagnostics and Error Codes ........................................................... 4-3
Cleaning .......................................................................................................... 4-6
AC Fuse Replacement..................................................................................... 4-7
DC Fuse Replacement..................................................................................... 4-9
Performance Test............................................................................................. 4-9
Configuring the Performance Test Setup.................................................. 4-9
Initializing the Performance Test Setup.................................................... 4-11
Accuracy Performance Tests........................................................................... 4-13
Master Alarm Output Tests....................................................................... 4-14
RS-232 Master Alarm Output Test....................................................... 4-14
Fluke DAQ Master Alarm Output Test................................................ 4-14
Trigger Input Tests ................................................................................... 4-15
RS-232 Trigger Input Test.................................................................... 4-15
Fluke DAQ Trigger Input Test............................................................. 4-15
Trigger Output Tests................................................................................. 4-15
RS-232 Trigger Output Test................................................................. 4-15
Fluke DAQ Trigger Output Test .......................................................... 4-16
Volts DC Accuracy Test (PAI Module).................................................... 4-16
Volts DC Accuracy Test (FAI Module).................................................... 4-17
iv
Contents
(continued)
Volts AC Accuracy Test ........................................................................... 4-18
Frequency Accuracy Test.......................................................................... 4-19
Analog Channel Integrity Test .................................................................. 4-20
Open Thermocouple Response Test.......................................................... 4-20
2-Wire Resistance Accuracy Test (PAI) - Optional.................................. 4-21
2-Wire Resistance Accuracy Test (FAI Module) - Optional..................... 4-22
4-Wire Resistance Accuracy Test (PAI Module)...................................... 4-24
4-Wire Resistance Accuracy Test (FAI Module)...................................... 4-28
Digital Input/Output Tests......................................................................... 4-29
RS-232 Digital Input/Output Test......................................................... 4-29
Fluke DAQ Digital Input/Output Test .................................................. 4-30
DIO Relay/Fuse Tests ............................................................................... 4-30
RS-232 DIO Relay Fuse Test ............................................................... 4-30
Fluke DAQ DIO Relay Fuse Test......................................................... 4-30
Totalizer Tests........................................................................................... 4-31
RS-232 Totalizer Count Test ................................................................ 4-31
RS-232 Totalizer Count and Enable Test ............................................. 4-31
RS-232 Totalizer Count and Direction Test ......................................... 4-32
RS-232 Totalizer Count and Debounce Test ........................................ 4-32
Fluke DAQ Totalizer Count Test.......................................................... 4-33
Fluke DAQ Totalizer Count and Enable Test....................................... 4-33
Fluke DAQ Totalizer Count and Direction Test................................... 4-34
Fluke DAQ Totalizer Count and Debounce Test.................................. 4-34
Calibration ....................................................................................................... 4-35
Variations in the Display ................................................................................. 4-35
Service ............................................................................................................. 4-36
Replacement Parts ........................................................................................... 4-36
Appendices
A Specifications ............................................................................................ A-1
B Noise, Shielding, and Crosstalk Considerations ....................................... B-1
C True-RMS Measurements ......................................................................... C-1
D RTD Linearization..................................................................................... D-1
E Computed Channel Equations................................................................... E-1
F Data File Format........................................................................................ F-1
G Ethernet Cabling........................................................................................ G-1
H Network Considerations............................................................................ H-1
I Error Codes ............................................................................................... I-1
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2680A/2686A
Users Manual
vi
List of Tables
Table Title Page
1-1. Channel Count vs Scan Rate............................................................................ 1-16
1-2. Models, Options and Accessories.................................................................... 1-18
2-1. Front Panel Key Descriptions.......................................................................... 2-18
2-2. Annunciator Display Descriptions................................................................... 2-20
2-3. Instrument Default Parameters ........................................................................ 2-24
2-4. Displaying a Monitor Channel......................................................................... 2-25
2-5. Displaying the Digital I/O Status..................................................................... 2-27
2-6. Displaying Relay Status................................................................................... 2-28
2-7. Displaying Totalizer Status.............................................................................. 2-30
2-8. Reviewing and Setting the Base Channel Number.......................................... 2-31
2-9. Reviewing and Setting the Line Frequency..................................................... 2-33
2-10. Reviewing and Setting the Network Type....................................................... 2-35
2-11. Reviewing and Setting the Network Type to General ..................................... 2-37
2-12. Reviewing and Setting the General Network Socket Port ............................... 2-40
2-13. Reviewing and Setting the General Network IP Address................................ 2-41
2-14. Reviewing and Setting the Subnet Mask and Default Gateway ...................... 2-43
2-15. Viewing the Instrument Ethernet Address....................................................... 2-44
2-16. Identifying Network Problems......................................................................... 2-58
2-17. Ethernet Indicators........................................................................................... 2-61
3-2. Configuration Control States ........................................................................... 3-29
3-3. File Renaming Example................................................................................... 3-51
3-4. File Size Control Criteria................................................................................. 3-52
4-1. Self-Test Codes................................................................................................ 4-4
4-2. Recommended Test Equipment....................................................................... 4-10
4-3. Replacement Parts ........................................................................................... 4-36
A-1. 2680 Series General Specifications ................................................................. A-2
A-2. 2680A/2686A Clock and Calendar.................................................................. A-3
A-3. Trigger In Specification................................................................................... A-4
A-4. Trigger Out Specification ................................................................................ A-4
A-5. Master Alarm Output Specification................................................................. A-5
A-6. 2686A - Active Channels and Number of Scans to Card Capacity................. A-5
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Users Manual
A-7. PAI Module DC Voltage General Specifications............................................ A-6
A-8. PAI Module DC Voltage Range and Resolution Specifications..................... A-7
A-9. PAI Module DC Voltage Accuracy Specifications......................................... A-7
A-10. PAI Module AC Voltage General Specifications............................................ A-8
A-11. PAI Module AC Voltage Range and Resolution Specifications..................... A-9
A-12. PAI Module AC Voltage Accuracy Specifications......................................... A-10
A-13. PAI Module 4-Wire Resistance Temperature Coefficient .............................. A-11
A-14. PAI Module 4-Wire Resistance Range and Resolution Specifications........... A-11
A-15. PAI Module 4-Wire Resistance Accuracy Specifications............................... A-12
A-16. PAI Module 4-Wire RTD Temperature Coefficient ....................................... A-13
A-17. PAI Module 4-Wire RTD Specifications ........................................................ A-13
A-18. PAI Module Thermocouple General Specifications........................................ A-14
A-19. PAI Module Thermocouple Specifications ..................................................... A-15
A-20. PAI Module Frequency Accuracy Specifications ........................................... A-17
A-21. PAI Module Frequency Sensitivity Specifications.......................................... A-17
A-22. FAI Module DC Voltage General Specifications............................................ A-18
A-23. FAI Module DC Voltage Resolution and Repeatability Specifications.......... A-19
A-24. FAI Module DC Voltage Accuracy Specifications......................................... A-19
A-25. FAI Module AC Voltage General Specifications............................................ A-20
A-26. FAI Module AC Voltage Range and Resolution Specifications..................... A-20
A-27. FAI Module AC Voltage Accuracy Specifications......................................... A-21
A-28. FAI Module 4-Wire Resistance Temperature Coefficient .............................. A-22
A-29. FAI Module 4r-Wire Resistance Range and Resolution Specifications.......... A-22
A-30. FAI Module 4-Wire Resistance Accuracy Specifications............................... A-23
A-31. FAI Module 4-Wire RTD Temperature Coefficient ....................................... A-23
A-32. FAI Module 4-Wire RTD Specifications ........................................................ A-24
A-33. FAI Module Thermocouple General Specifications........................................ A-24
A-35. FAI Module Frequency Accuracy Specifications ........................................... A-27
A-36. FAI Module Frequency Sensitivity Specifications.......................................... A-27
A-37. DIGITAL I/O Specification ............................................................................ A-28
A-38. Totalizer Specification .................................................................................... A-29
A-39. DIGITAL I/O Relay Specification.................................................................. A-29
B-1. FAI Module Crosstalk Specifications. ............................................................ B-3
B-2. PAI Module Crosstalk Specifications ............................................................. B-4
I-1. Error Codes ..................................................................................................... I-1
viii
List of Figures
Figure Title Page
1-1. 2680A/2686A Instrument ................................................................................ 1-4
1-2. 2680A/2686A Front Panel............................................................................... 1-5
1-3. Typical Front Panel Display During Scanning and Monitoring...................... 1-6
1-4. 2680A/2686A Rear Panel ................................................................................ 1-7
1-5. DIO Connector Module ................................................................................... 1-13
2-1. Instrument Preparation..................................................................................... 2-4
2-2. Connecting the Instrument to a Power Source................................................. 2-6
2-3. Alarm/Trigger I/O Connector.......................................................................... 2-9
2-4. External Trigger Wiring for a Group of Instruments....................................... 2-11
2-5. Universal Input Module Connections .............................................................. 2-13
2-6. 2-Wire and 4-Wire Connections..................................................................... 2-14
2-7. Digital I/O Connector ...................................................................................... 2-16
2-8. Front Panel Controls ........................................................................................ 2-17
2-9. Front Panel Indicators...................................................................................... 2-19
2-10. Rear Panel Controls ......................................................................................... 2-22
2-11. Displaying a Monitor Channel......................................................................... 2-26
2-12. Examples During Monitor ............................................................................... 2-26
2-13. Examples for Digital I/O, Relay, and Totalizer Status .................................... 2-29
2-13. Reviewing and Setting the Base Channel Number.......................................... 2-32
2-14. Examples for Reviewing and Setting the BCN................................................ 2-32
2-14. Reviewing and Setting the Line Frequency..................................................... 2-34
2-15. Examples for Reviewing and Setting the Line Frequency............................... 2-34
2-15. Reviewing and Setting the Isolated Network Type to Isolated........................ 2-36
2-16. Examples for Reviewing and Setting the Network Type................................. 2-36
2-17. Examples for Reviewing and Setting General Network Parameters ............... 2-38
2-17. Viewing the Instrument Ethernet Address....................................................... 2-45
2-18. Examples for Viewing the Ethernet Address................................................... 2-45
2-19. Preparing for Network Operation .................................................................... 2-48
2-20. Host Computer/Instrument Direct Connection ................................................ 2-49
2-21. Interconnection Using 10/100BaseT (Twisted Pair) Wiring ........................... 2-51
4-1. Replacing the Fuse........................................................................................... 4-8
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4-2. Performance Test Setup .................................................................................. 4-11
4-3. 2-Wire Connections to 5700A......................................................................... 4-24
4-4. 4-Wire Connections to the Universal Input Module (Resistor)....................... 4-25
4-5. 4-Wire Connections to the Universal Input Module (5700A)......................... 4-26
A-1. 2680 Series Chassis......................................................................................... A-30
C-1. Comparison of Common Waveforms.............................................................. C-3
D-1. 385 RTD.......................................................................................................... D-2
D-2. 375 RTD.......................................................................................................... D-3
D-3. 391 RTD.......................................................................................................... D-4
D-4. 392 RTD.......................................................................................................... D-6
G-1. 10/100BaseT Ethernet Cables ......................................................................... G-2
x
Chapter 1
Overview
Introduction 1-3
Contacting Fluke ............................................................................................. 1-3
Instrument Features and Capabilities .............................................................. 1-5
Mainframe Features.................................................................................. 1-8
Trigger Input......................................................................................... 1-8
Trigger Output...................................................................................... 1-8
PC Card ATA Interface (2686A Only)................................................. 1-8
Master Alarm........................................................................................ 1-9
Interval Trigger..................................................................................... 1-9
External Trigger.................................................................................... 1-9
Alarms .................................................................................................. 1-9
Channel Monitoring.............................................................................. 1-10
Alarm Trigger....................................................................................... 1-10
Channel Numbering.................................................................................. 1-10
Computed Channels.................................................................................. 1-11
Mx+B Scaling........................................................................................... 1-11
Analog Channels....................................................................................... 1-11
Digital I/O Module Option........................................................................ 1-12
Digital I/O............................................................................................. 1-12
Relay Output......................................................................................... 1-12
Totalizer................................................................................................ 1-12
User Interface .................................................................................................. 1-13
Operating a 2680 Series Data Acquisition System.......................................... 1-14
Isolated Networks ..................................................................................... 1-14
General Networks ..................................................................................... 1-14
Ethernet Port ............................................................................................. 1-14
Group Operations...................................................................................... 1-15
Scanning and Logging .............................................................................. 1-15
RS-232 Interface....................................................................................... 1-17
Host Computer Requirements ......................................................................... 1-17
Options and Accessories ................................................................................. 1-18
Contents Page
1-1
2680A/2686A
Users Manual
1-2
Introduction
The 2680A Data Acquisition System (DAS) and 2686A Data Logging System
(DLS) provide 20 to 120 channels that operate in conjunction with Fluke DAQ
software for Windows to form a data acquisition system.
The 2686A comes with a removable PC Card (PCMCIA) for stand-alone storage
operation. This socket accepts ATA memory cards up to 2 GB in size.
Each 2680 Series instrument can hold from 1 to 6 modules. These modules are the
Precision Analog module (PAI), Fast Analog module (FAI), and the Digital
IO/Relay and Totalizer module (DIO). These modules are all isolated from one
another. You can add the DIO module to the instrument in slot 6 only.
The analog modules measure dc volts, ac volts, ohms, temperature, frequency, and
dc current. Temperature measurements use thermocouples, thermistors or
resistance temperature detectors (RTDs). The instruments also have extensive
computed math capability. Besides using data collected from the analog modules
and digital totalizer, time can also be used in computed channel calculations.
The system scans 20 to 120 analog channels and calculates the values for up to 60
computed channels. Interval timers, alarm conditions, and/or an external signal
input can trigger scans. The Fluke DAQ software configures and controls up to 99
2680 Series instruments via an Ethernet connection. The software provides the
means to view scan data and log it into files. In addition, Fluke DAQ software
permits multiple master/slave groups to run simultaneously.
Overview
Introduction
1
The two analog modules that may be used with the 2680 Series are the FAI
module and the PAI module. The PAI modules emphasize precision with 5 ½
digits of resolution, .02% accuracy, and can withstand up to 150 V common mode
voltage (300 V on channels 1 and 11). The FAI modules emphasize increased
measurement speed with 4 ½ digits of resolution, 0.04% accuracy, and can
withstand up to 50 V common mode voltage. See Appendix A for instrument
specifications.
Contacting Fluke
To contact Fluke, call one of the following telephone numbers:
USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: +31 402-675-200
Japan: +81-3-3434-0181
Singapore: +65-738-5655
Anywhere in the world: +1-425-446-5500
Or, visit Fluke's Web site at www.fluke.com
1-3
.
2680A/2686A
Users Manual
2680 SERIES DAQ SYSTEM
REVIEW
MAX
REM
LAST
SCAN
MIN
AUTO
SET
FUNC
MON
Mx+B
F
ALARM
C F RO
mV AC DC
LIMIT
x1Mk
HI
Hz
OFF
PRN
12
CH
LO
CAL
EXT
TR
Figure 1-1. 2680A/2686A Instrument
alg46f.eps
1-4
Instrument Features and Capabilities
Instrument Features and Ca pabilities
The following describes the front and rear panels of the instrument and its
capabilities (Figures 1-2 to 1-4).
Overview
1
Primary, Secondary, and Annunciator Displays.
Indicators and annunciators for operating mode,
configuration, display, and data measurements.
2686A DATA ACQUISITION SYSTEM
F
FUNC
SET
MAX
REM
SCAN
REVIEW
MIN
LAST
Function Keys. User keys for configuring
ALARM
Mx+B
AUTO
MON
C F RO
mV AC DC
LIMIT
Hz
x1Mk
12
operating parameters such as Base Channel
Number, and front panel displays such as
channel monitoring, digital I/O status, and
totalizer count.
Status Indicator (LED)
PRN
OFF
HI
EXTCHTR
CAL
LO
Eject Button
PC Card Slot
(Only available
on the 2686A)
Hz
F
LIMIT
12
HI
LO
OFF
CAL
PRN
EXTCHTR
REVIEW
LAST
MAX
MIN
REM
AUTO
SCAN
MON
SET
Mx+B
FUNC
ALARM
C F RO
mV AC DC
x1Mk
Display detail
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Figure 1-2. 2680A/2686A Front Panel
1-5
2680A/2686A
Users Manual
REM (Remote)
Annunciator.
Indicates the Host
Computer and the
Instrument are
communicating on the
network, i.e., the
instrument is being
operated remotely.
SCAN (Scanning)
Annunciator.
Indicates the
instrument is
scanning.
MON (Monitor)
Annunciator.
Indicates the
instrument is
monitoring a channel
(in this example,
analog channel 208).
You can monitor a
channel with or
without instrument
scanning.
11208 (Global
ChannelNumber).
Indicates the channel
being monitored is
11208. This number
consists of the
instrument Base
Channel Number (11),
Module Number (2)
and the selected
channel (08).
1-6
m Annunciator.
Indicates the multiplier
for the reading is .001
(milli). The other
multipliers are k (kilo,
1000), and M (mega,
1,000,000).
14.721 (Reading).
Indicates the reading
of the channel being
monitored has a value
of 14.721.
V DC (Volts DC)
Annunciator.
Indicates that the
number shown in the
primary display
(14.721) is the
function volts dc.
Figure 1-3. Typical Front Panel Display During Scanning and Monitoring
CH (Channel)
Annunciator.
Indicates the number
shown in the
secondary display
(11208) is the Global
Channel Number.
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Instrument Features and Capabilities
Overview
1
Ethernet 10/100BaseT Connector.
A RJ-45 connector that interfaces the
instrument with a 10/100BaseT
Twisted Pair Ethernet network. The
instrument automatically detects 10 or
100BaseT operation.
Power Switch.
Supplies power to the
instrument (ac or dc
operation).
Ground Terminal.
Connect to earth
ground when using
DC power.
Fuse Compartment
MODEL
2680A
2686A
FLUKE CORPORATION
MADE IN USA
www.fluke.com
PATENTS PENDING
STANDBY
CAUTION:
FOR FIRE PROTECTION
REPLACE ONLY WITH
A 250V FUSE OF
INDICATED RATING
CHASSIS
GROUND
FUSE
T1/2A 250V
WARNING:
TO AVOID
ELECTRIC SHOCK GROUNDING
CONNECTOR IN POWER CORD
MUST BE CONNECTED
NO INTERNAL USER SERVICEABLE PARTS.
REFER SERVICE TO QUALIFIED SERVICE PERSONNEL
AC Power Connector.
Connects to any line source
of 100 to 240 V ac (50/60 Hz).
SLOT CONFIGURATION
1
2
3456
SERIAL NUMBER
XMT
RCV
10/100 BASE T
ETHERNET
NOT FOR
CONNECTION
TO PUBLIC
TELEPHONE
SYSTEM
LINK
RS-232
SERIAL
PORT
(SB)
MAIN SUPPLY
100V- 240V
47Hz / 63Hz
100VA MAX
Ethernet Indicators.
XMT (transmit) blinks red for
instrument Ethernet transmissions.
RCV (receive) blinks red for any
Ethernet activity on the network.
LNK (link) lights red if 10BaseT is
operating, green if 100BaseT is
operating.
RS232
Serial Port
(for service use)
ALARM/TRIGGER I/O Connector.
Master Alarm output is logic low
when any channel is in alarm;
Trigger Out output is logic low for
nominal 125 ms start of any scan;
Trigger In input logic low triggers
scanning; DC PWR (dc volts input)
input is 9 to 45 V dc to power the
instrument.
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Figure 1-4. 2680A/2686A Rear Panel
1-7
2680A/2686A
Users Manual
Mainframe Features
Trigger Input
Trigger Input is an instrument connection used to trigger scans from an external
source. The connection uses the rear panel Trigger In and GND (Figure 1-4). A
logic low or contact closure between Trigger In and GND triggers an instrument
scan if External Trigger is enabled. While the trigger input line is held low, the
instrument continues to scan at Interval 2.
When there is no trigger input, an internal pull-up resistor holds the input at logic
high (nominal +5.0 V dc).
Trigger Output
Trigger Output is an output line that, when enabled, goes to logic low for 125 µs
every time a scan begins. The connection uses the rear panel Trigger Out and GND
(Figure 1-4). Use the Trigger Output to trigger other instruments by their Trigger
Input connection and to interface with external equipment. An internal pull-up
resistor holds the trigger output line at a logic high (nominal +5.0 V dc) when
there is no trigger output.
PC Card ATA Interface (2686A Only)
A PC ATA card interface provided in each 2686A system. It can be used to store
data when there is no network connection. The data produced is DOS compatible.
When scanned data is first recorded on the card, a copy of the configuration of the
instrument is also recorded. As a result, you can stop scanning, remove the card,
read results, reinstall the card in the same instrument, and restart scanning and
have only one file created. If you want to clear the existing memory card, the front
panel keys can be used to erase the card contents. You can use up to 2 GB ATA
compatible PC Card in a 2686A instrument. See Chapter 2 for additional
information.
1-8
An error will result if a card has partially been filled with data from a different
configuration. This can be fixed by using the front panel keys to erase the existing
data in the card.
XWCaution
Removing the PC card while the storage LED is on may
cause a loss of data. Before removing the card, stop the
instrument scanning. Loss of power while data is being
written to the card may also result in loss of data.
Master Alarm
Master Alarm is an instrument output line that is logic low (nominal +0.8 V dc) for
as long as any channel is in alarm while scanning is active. The connection uses
the ALARM/TRIGGER I/O terminals Master Alarm and GND (Figure 1-4). This
TTL output interfaces with external equipment such as warning lights, alarms,
automatic shutdowns, and paging systems. When the alarm condition ends or
scanning stops, an internal pull-up resistor sets the output at logic high (nominal
+5.0 V dc).
Interval Trigger
Interval Trigger is an internal software timer you can set using Fluke DAQ
software. It permits scanning at regular time intervals using Interval 1. Interval 1 is
in seconds, with a minimum of 0.000 (continuous scanning) and a maximum of
86400.000 (one scan every 24 hours). The time resolution is to the millisecond, for
example, 12.345 seconds.
External Trigger
External Trigger is started by an external event and triggers scanning when an
external logic low is applied to the instrument Trigger In line. As long as the
Trigger Input remains low, scans are triggered at regular time intervals using
Interval 2. Interval 2 is in seconds, with a minimum of 0.000 (continuous
scanning) and a maximum of 86400.000 (one scan every 24 hours). The time
resolution is to the millisecond, for example, 12.345 seconds. When scanning
starts, if the External Trigger is logic low, scanning begins at the Interval 2 rate. If
the External Trigger is logic high, no scans are triggered until the trigger line is set
to logic low.
Overview
Instrument Features and Capabilities
1
If one or more external trigger events occur while a scan is in progress, one
triggered scan follows the scan in progress.
Alarms
Two alarms, Alarm 1 and Alarm 2, can be applied to any configured channel. An
alarm condition occurs when a measurement falls below a low alarm value, rises
above a high alarm value, or is between the two alarm values. If you apply Mx+B
scaling as part of the channel configuration, the instrument bases the alarms on the
scaled values.
When any configured channel is in alarm, the Alarm annunciator is on dim, or
bright if a channel in alarm is being used as an Alarm Trigger. When a channel is
in alarm, the rear-panel Master Alarm output is asserted (logic low). You can use
alarms to trigger scanning (see Alarm Trigger later in this chapter) and to set a
Digital I/O line to a logic low (see Digital I/O Module later in this chapter) or
close a relay. The Fluke DAQ software displays and records alarm conditions.
1-9
2680A/2686A
Users Manual
Channel Monitoring
Channel monitoring takes place at the front panel of the instrument. Use the front
panel MON key and arrow keys to select a channel for monitoring. The Fluke
DAQ software also allows the selection of a channel to monitor during scanning.
For an example of a front panel display of the instrument during monitoring, see
Figure 1-3. Monitor can also automatically scroll up or down through the channels
displaying each channel and then moving to the next. The channel monitoring
display nominally updates once per second.
Alarm Trigger
The alarm trigger triggers scanning when a channel designated as an alarm trigger
goes into alarm. As long as any such channel is in alarm, scans are triggered at
regular time intervals using Interval 2. Interval 2 is in seconds, with a minimum of
0.000 (continuous scanning) and a maximum of 86400.000 (one scan every 24
hours). The time resolution is to the millisecond, for example, 12.345 seconds.
The instrument performs background monitoring of channels designated as alarm
triggers to check for alarm conditions using Interval 3.
You can combine Alarm Trigger with External Trigger and Interval Trigger. For
example, set the Interval Trigger for 60 seconds (Interval 1) and the Alarm Trigger
for 10 seconds (Interval 2). Scanning is at 60 second intervals except when a
channel designated as an alarm trigger is in alarm, when scanning is at 10 second
intervals.
Channel Numbering
Each instrument channel, measured or computed, is identified by the Global
Channel Number (GCN). The first two digits of the GCN are the Base Channel
Number (01 to 99) that identifies the instrument. The third digit indicates the slot
or module number. The last two digits are the channel number. For example, GCN
28318 indicates instrument 28 , slot 3, and channel 18. When the instrument is in
the quiescent state, the channel number of the GCN shows dashes, for example,
45--- for instrument 45.
1-10
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Computed Channels
In addition to the analog channels, the instrument provides an additional 60
computed channels by processing analog channels and other computed channels.
The computed channels are numbered 901 to 960. The following calculations are
used:
• The average of a group of channels,
• The difference between any two channels,
• The difference between a channel and the average of a group of channels,
• A mathematical equation. Other channels, time and totalizer can be part of the
equation.
For computed channels, the functions use 24 bits and an exponent for calculations.
As a result, when the totalizer or time exceed 16,777,215 units, the number will be
rounded off to remain within the 24 bits. For example, one count more than
16,777,215 would be rounded to 16,777,220 in a computed channel.
Mx+B Scaling
Mx+B scaling multiplies a measurement by a multiplier M and then offsets it by
an offset B. For example, Mx+B scaling of 100x+50 applied to a measured or
computed channel value of 1.15 results in a reading of 100(1.15)+50=165. A
common use of Mx+B scaling is to scale a sensor or transducer to provide for
display and recording in engineering units. The Mx+B annunciator lights when a
monitored channel has scaling applied.
Overview
Instrument Features and Capabilities
1
Analog Channels
The analog channel measurement connections are made via the Universal Input
Modules. External signal conditioning for the analog inputs is not necessary for
most common electrical signals. The input channels are numbered 101 to 120, 201
to 220, 301 to 320, 401 to 420, 501 to 520, and 601 to 620. The host computer
configures all analog channels using the Fluke DAQ software.
There are two different analog modules available for the 2680 Series instruments
with up to 6 modules for any given instrument. Each module is isolated from every
other module to 300 V. One analog module is the fast analog module (FAI) and
has a maximum rate of 667 channel readings per second but a limited input voltage
of 50 V dc or 30 V rms. The other analog module is the precision analog module
(PAI). The PAI has a maximum of 300 V dc rms (on channel 1 and 11) and a
maximum rate of 133 channel readings per second. All other channels are 150 V
maximum for the PAI module. The Digital IO/Relay and Totalizer module can
monitor digital type (High or Low) signals.
1-11
2680A/2686A
Users Manual
Digital I/O Module Option
Digital I/O
20 general-purpose open collector digital outputs and Transistor Logic (TTL)
digital input lines are available in the Digital I/O module. A logic low can be
applied to an I/O line as an input; alternatively a logic low can be internally set by
the instrument if the channel is set as an output. If no logic low is set or applied
externally, the input is pulled up to logic high (+5 V) internally. An output logic
low condition takes precedence over an input logic high condition. When the I/O
lines are used as inputs, they signal an external condition that can be correlated to
the data measurements.
Fluke DAQ software records the status of the Digital I/O as the decimal equivalent
of the 20 binary bits. For example, 1111 1111 1111 1111 1111 (DIO19 to DIO0) is
represented by decimal 1,048,575; 0000 0000 0000 0000 1111 is represented by
decimal 15.
The instrument can display the Digital I/O status in binary format at the front panel
with updates each second.
Relay Output
There are also 8 relays capable of switching up to 1 A or 250 V rms. Fluke DAQ
software records the relay status as bits 24-31 of the DIO value. The selay status
can also be displayed on the instrument front panel.
1-12
Totalizer
The Digital I/O module also includes a totalizer with external enable. The totalizer
input counts contact closures or voltage transitions with a maximum count of
4,294,967,295. There is also an external totalizer enable that can be used to enable
the totalizer. The totalizer can be preset and count down to zero or count up from
zero.
The connections for the totalizer are the Σ and Σen input lines on the Digital I/O
connector (Figure 1-5). The instrument continuously detects the totalizer input on
the rear panel independently from instrument scanning and other activities. If the
Totalizer overflows (reaching the maximum count), the display briefly shows OL
(overload) and begins counting again.
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